Thu, 04 Oct 2012 10:40:23 -0700
7198873: NPG: VM Does not unload classes with UseConcMarkSweepGC
Reviewed-by: johnc, mgerdin, jwilhelm
1 /*
2 * Copyright (c) 2002, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
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23 */
25 #ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_GENERATIONCOUNTERS_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_GENERATIONCOUNTERS_HPP
28 #include "runtime/perfData.hpp"
29 #include "runtime/virtualspace.hpp"
31 // A GenerationCounter is a holder class for performance counters
32 // that track a generation
34 class GenerationCounters: public CHeapObj<mtGC> {
35 friend class VMStructs;
37 private:
38 void initialize(const char* name, int ordinal, int spaces,
39 size_t min_capacity, size_t max_capacity,
40 size_t curr_capacity);
42 protected:
43 PerfVariable* _current_size;
44 VirtualSpace* _virtual_space;
46 // Constant PerfData types don't need to retain a reference.
47 // However, it's a good idea to document them here.
48 // PerfStringConstant* _name;
49 // PerfConstant* _min_size;
50 // PerfConstant* _max_size;
51 // PerfConstant* _spaces;
53 char* _name_space;
55 // This constructor is only meant for use with the PSGenerationCounters
56 // constructor. The need for such an constructor should be eliminated
57 // when VirtualSpace and PSVirtualSpace are unified.
58 GenerationCounters()
59 : _name_space(NULL), _current_size(NULL), _virtual_space(NULL) {}
61 // This constructor is used for subclasses that do not have a space
62 // associated with them (e.g, in G1).
63 GenerationCounters(const char* name, int ordinal, int spaces,
64 size_t min_capacity, size_t max_capacity,
65 size_t curr_capacity);
67 public:
68 GenerationCounters(const char* name, int ordinal, int spaces,
69 VirtualSpace* v);
71 ~GenerationCounters() {
72 if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space, mtGC);
73 }
75 virtual void update_all();
77 const char* name_space() const { return _name_space; }
79 };
80 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_GENERATIONCOUNTERS_HPP